Mutant birnavírus birnavírus vaccine against infection by birnavírus in animals process to determine a birnavírus infection in an animal diagnostic test kit and the use of the lack of exprePressure VP

摘要

The present invention provides a birnavirus mutant which is suited as vaccinecandidatein eradication control programmes. The mutant is not able to produce a nativeVP5 protein, andthis feature can be used as a marker to distinguish between animals vaccinatedwith the VP5mutant or infected with a naturally-occurring birnavirus.